Code 41 on a 1992 Accord EX (Primary HOsS (No. 1) Heater System).

Is the solution just to replace the O2 sensor at the base on the exhaust header ?

How can I measure whether the new one is working properly ?

Mech also says EGR ports are plugged causing uneven distribution (misfire under load)

Will a Seaform treatment fix this, or do I have to 'un-plug' the intake and scrape the carbon out of it ?

 

Unplug the O2 sensor & find the 2 same-color (black??) wires attached to the sensor. Measure resistance between them - should be 10 to 40 ohms. If not, you need a new sensor.

If that resistance is OK, then the problem may be the car's wiring. In that case a new sensor won't help.

I think there's a thread around here somewhere about the EGR ports, but I've never had to do that so ???

 

Jim, I forgot, which fuse protects the heater, I forgot, cig lighter???????

 

the egr port cleaning threads are in the FAQ ..covers most models..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Duane_in_Japan &raquo;</TD></TR><TR><TD CLASS="quote">Jim, I forgot, which fuse protects the heater, I forgot, cig lighter???????</TD></TR></TABLE>Probably not the same for all years/models. IIRC, on my '95 Integra it was the same fuse that supplied power for the ECU.